Ben: "What if I used this phone and called Bella right now?"
Joslyn: "Do that and I'll shove it down your throat."
Ben: "Fobby!"
Joslyn: "OH MY LORD!"
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Sam: "So I took the package to my neighbor and said: 'I think they switched our packages' and-"
Heather: "HAH! FOBBY!!!!"
Sam: "You need to stop! haha, like now!"
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Harper: "So how was the haunted house last night? Sorry I couldn't tag along."
Sabrina: "Omg it was so scary. I was literally screaming all night long! haha."
Harper: "Oh god, fobby! haha"
Sabrina: "Omg ewww get out ! haha"

the snobby, nonchalant attitudes of certain groups of "Fresh Off Boat" ( fob ) people (new immigrants, usually from Asian countries). These newcomers to a country stick to their own cultural groups and usually stick their noses up at the cultures of their adopted country.

He is so fobby because he only hangs out with people from his own cultural group and do not attempt to learn the cultures of his adopted country.